电场耦合型无线电能传输系统拓扑研究及调谐控制

发布时间：2018-11-28 14:32

【摘要】：近百年来，几乎所有的电气设备都是通过电气接触的方式从电网获取电能。然而，对于轨道交通、吊装设备、小家电、旋转机构等移动电气设备，这种方式会影响设备的灵活移动；而对于矿井、油库及煤矿等特殊环境中的设备，这种方式还增加了安全隐患。为了解决移动电气设备（或特殊环境设备）的电能灵活、安全接入问题，无线电能传输（WPT，wireless power transfer）技术应运而生。基于电磁感应耦合的无线电能传输（ICPT，Inductively Coupled Power Transfer）是目前在WPT技术领域相对较热的研究方向。但由于电场在许多特性上与磁场相似而且两者在基本理论上也呈现出对偶性，因此近几年国内外许多研究团队开始关注基于电场耦合的无线电能传输（ECPT，Electric-field Coupled Power Transfer）技术的研究。该技术为无线电能传输提供了一种新的途径，进一步拓展无线电能传输技术的研究领域，并促进与无线电能传输相关的理论和技术的进步。本文主要对ECPT系统的电路拓扑及调谐控制进行研究。首先论述了ECPT系统的国内外研究现状，并对ECPT系统的基本工作原理及特点做了简要的介绍。然后在分析了ECPT系统中常用的几种拓扑结构及其调谐控制方法的基础之上，针对ECPT系统耦合机构的高频高压驱动需求与初级高频电能变换环节开关管的低压需求之间相互制约的矛盾，提出一种融入高频变压器的ECPT系统电能发射端变换拓扑。本文在给出了一种适合于ECPT系统的高频变压器模型基础上，确定了高频变压器电压变比的取值范围。针对所提出的融入高频变压器ECPT系统电能发射端变换拓扑，给出影响传输功率与效率的几个主要参数确定方法。同时对主电路的驱动电路做出了简要论述。利用Matlab/simulink仿真平台对系统软开关实现方案、参数敏感性、系统传输功率大小等进行详细分析。同时给出了系统动态调谐控制目标以及相应的调谐控制方法。在获得调谐控制方法的数学描述的基础上，提出一种调谐电容矩阵的设计方法。最后在Matlab/simulink仿真平台上搭建了整体系统仿真模型，，进行仿真分析。结果说明当融入高频变压器的ECPT系统耦合电容值在一定范围内变化时，通过动态调谐控制，系统能够始终工作在软开关状态，并进行了实验验证。
[Abstract]:In the last hundred years, almost all electrical devices have obtained electricity from the power grid by means of electrical contact. However, for rail transit, hoisting equipment, small household appliances, rotating mechanism and other mobile electrical equipment, this way will affect the flexible movement of equipment; For equipment in special environments such as mines, oil depots and coal mines, this approach also increases safety risks. In order to solve the problem of flexible and secure access to electric energy of mobile electrical equipment (or special environment equipment), radio energy transmission (WPT,wireless power transfer) technology emerged as the times require. Radio energy transmission (ICPT,Inductively Coupled Power Transfer) based on electromagnetic induction coupling (ICPT,Inductively Coupled Power Transfer) is a relatively hot research direction in the field of WPT technology. However, because the electric field is similar to the magnetic field in many characteristics and presents duality in basic theory, many research teams at home and abroad have begun to pay attention to the radio energy transmission (ECPT,) based on electric field coupling in recent years. Research on Electric-field Coupled Power Transfer) technology. This technology provides a new way for radio energy transmission, further expands the research field of radio energy transmission technology, and promotes the development of theory and technology related to radio energy transmission. In this paper, the circuit topology and tuning control of ECPT system are studied. Firstly, the research status of ECPT system at home and abroad is discussed, and the basic working principle and characteristics of ECPT system are briefly introduced. Then, based on the analysis of several topology structures and tuning control methods in ECPT system, In view of the contradiction between the high frequency and high voltage driving requirements of the coupling mechanism of ECPT system and the low voltage demand of the switch in the primary high frequency power conversion link, a power transmitter topology of the ECPT system integrated with the high frequency transformer is proposed. Based on a model of high frequency transformer suitable for ECPT system, the range of voltage change ratio of high frequency transformer is determined in this paper. In view of the proposed topology transformation of the power transmitter in the ECPT system with high frequency transformer, several main parameters determining the transmission power and efficiency are given. At the same time, the driving circuit of the main circuit is briefly discussed. The realization scheme of soft switch, sensitivity of parameters and transmission power of the system are analyzed in detail by using Matlab/simulink simulation platform. At the same time, the dynamic tuning control target and the corresponding tuning control method are given. Based on the mathematical description of tuning control method, a design method of tuning capacitance matrix is proposed. Finally, the whole system simulation model is built on the Matlab/simulink simulation platform, and the simulation analysis is carried out. The results show that when the coupling capacitance of ECPT system with high frequency transformer changes within a certain range, the system can always work in soft switching state by dynamic tuning control, and the experimental results are verified.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM724

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